Marshall e



(No Model.)

' M. B. GRAVES.

BED BOTTOM.

Patented May 29,1883.

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MARSHALL E. GRAVES, or LOWELL, MASS, ASSIGNOR TO'THE snonnr SPRING BED AND SHADE noLLEaooMr-ANY, OF SAME PLACE.

BED-BOTTOM.

SPECIFICATION formingpart of Letters Patent No. 278,330, dated May 29, 1883.

V Application filed February 3, 1883. (No model.)

To all whom it may concern Be it known that I, MARSHALL E. GRAVES, a citizen of the United States, residing at Low ell, in the county offlMiddleseX and Commonwealth of Massachusetts, have invented cer tain new and usefulImprovements in Bed-Bottoms, of which the following is a specification.

My invention relates to a bed-bottom having slats and longitudinal coiled springs attached to the ends of said slats'and to the frame of the bed-bottom, and to means of fiexi bly connecting the slats to each other.

In the accompanying drawings, Figure 1 is a plan of the bed-bottom; Fig. 2, aside elevation of the same standing on end; Fig. 3, an

end elevation of said bed-bottom; Fig. 4, a

' plan of the end of a slat provided with an end part of a slat provided with slots, into which 5 plate, and the ends of two springs attached to said plate; Fig. 5, a vertical cross-section of two slats connected by hooked wires and staples or eyes; Fig. 6, an edge or sideelevation of'a part of aslat, the end being broken away to-Show the slot and pin; Fig. 7, a plan of a the ends of the springs are inserted.

A is a rectangular frame of any suitable construction, having preferably end bars, B B, provided with inwardly-inclined upper surfaces, as shown in Fig. 2, and having also metallic attaching-plates'O G secured to the outer sides of said end bars, and provided with holes C near the upper edges of said plates C 0, into which holes the hooked outer ends,

E, of the longitudinal coiled springs E are hooked in the usual manner; but the outer ends of the springs may be connected to the frame Ain anyweltknown or convenient manner, such connection forming no part of the or eyesE in the slots F,,cut in the ends of the slats, and then inserting pins F in the slats from edge to edge of the same, at right angles to and crossing said slots F, and passing through the hooks or eyes E as Shown in Figs. 6 and 7. Another method of attaching the springs to the slats is shown in Figs. 1, 2, and 4, where the ends of the slats are slotted transversely, and in the slots'thus formed are inserted metallic plates F secured in place by rivets F, passing down through the slats and plates F these plates being provided with holes F into which are hooked the hooks or eyes Eiformed on theinner ends of the springs E. In either case the springs and slats are r jointed or flexibly connected together, so that 6 each spring and each slat may take the curva- I tore due to its own elastic'ity'to avoid giving a permanent bend or set to the wire near the end of the spring, (when the greater part of the weight is applied at or near the end of the; slat,)as would happenif the ends of the springs were rigidly attached to the slats. The slats, while intended to be sufficiently elastic, will not bend in so sharp a curve as springs, and cannot of course be stretched, and are there- 7 5 fore not so liable to sag in the middle as springs running the whole length of the bedbottom. The slats and springs combined as above described are cheaper than springs reaching from end to end of the bed-bottom, because the slats are cheaper than springs of thesame length when stretched, and also because there is less waste of the wire used to make the springs, inasmuch as apiece of Wire (at the end of the coil from which the wire is taken) too short to make one such long spring may yet be long enough to makeone,two, or more of the springs required for a bed-bottom of the construction herein described. Partly to prevent the slats from turning on edge when 0 only a single spring is used at each I end of a slat, and partly to prevent lateral displacement or spreading apartof the slats, I connect the slats to each other laterally by wires G, provided at each end with hooks G, which on 9 5 gage with eyes H or staples inserted in the edges of the slats, the hooked wires beinglong enough to allow any slat, when pressedupon, to move downward very slightly before drawing down the adjacent slats.

I claim as my invention---.

1. The combination, in a bed-bottom, of a IDO . i 4 l i PATENT .OFFICEe i. l

of said bed-bottom, as and for the purpose specified.

3. The combination of a series of parallel slats and wires provided with hooks, and means of connecting said hooks to the edge's of said slats, as and for the p'urposespe'c'ified;

4. Thecomloination of a series of slats provided with eyes at the edges of said slats, and the wires provided with hooks, as and for the purpose specified.

In testimonywhereofl have hereunto signed 20 my name this 25thday of January, A. D. 1883.

MARSHALL E. GRAVES.

Witnesses:

ALBERT M. MOORE, Pansoo'rr O. GATES. 

